threads, process synchronization

Synchronous:

Mutex, semaphore, shared memory

Mutex: The mutex object mechanism, the mutex object is unique, who has the mutex object can access the critical resources, otherwise wait

Signal Volume: P v operation

P: Request the semaphore, if the semaphore value is greater than 1, then the application succeeds, minus 1

V: Release semaphore

Process communication:

Pipelines, shared memory, messages, sockets

Shared memory: Typically created by one process for shared use by other processes

threads, process synchronization